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dirstate: avoid use of zip on big lists

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In a clean working directory containing 170,000 tracked files, this
improves performance of "hg --time diff" from 1.69 seconds to 1.43.

This idea is due to Siddharth Agarwal.
This commit is contained in:
Bryan O'Sullivan 2012-11-30 15:55:08 -08:00
parent a288702cfd
commit 09d0142d5e
1 changed files with 3 additions and 2 deletions
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5
mercurial/dirstate.py
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@ -696,8 +696,9 @@ class dirstate(object):
# step 3: report unseen items in the dmap hash
if not skipstep3 and not exact:
visit = sorted([f for f in dmap if f not in results and matchfn(f)])
for nf, st in zip(visit, util.statfiles([join(i) for i in visit])):
results[nf] = st
nf = iter(visit).next
for st in util.statfiles([join(i) for i in visit]):
results[nf()] = st
for s in subrepos:
del results[s]
del results['.hg']